基于小波变换的图像压缩

安卓文件管理——Android 原生文件管理FileManager代码，支持文件分类查看，可删除、查看手机中的文档、图片、视频等格式的文件，一个文件包括文件名和图表，采用一个垂直线性布局，使用BaseAdapter来存储取得的文件，重写getView方法来返回一个IconifiedTextView（我们自定义的文件布局）对象，源代码中包括丰富注释，详情请下载代码查看。

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说明：  使用STM32F103驱动TFMINI激光雷达程序(TFMINI lidar program driven by STM32F103)

對語音作一段前置處理，史的聲音比較圓滑，需要一段語音(right voice for a pre-processing, the history of the voice is relatively smooth, it would take a voice)

简易数字示波器MATLAB实现，我自己写的，非常简陋，练习程序，还望见谅(Simple digital oscilloscope MATLAB implementation, I wrote it myself, very simple, exercise procedures, but also look forward to forgive me.)

说明：  水声信道仿真程序。用于水下声信道的仿真。(underwater acoustic channel simulation program. for underwater acoustic channel simulation.)

说明：  输入椭圆中心和长短轴径; 2. 计算得到中心在原点的椭圆上的第一个点=; 3. 根据公式(1.1.3-2)计算区域1中决策参数的初值为; 4. 在区域1中每个位置处，从开始，反复按照公式(1.1.3-3)更新决策参数，若决策参数小于0则不变，反之加1，一直循环到为止，记第一个满足此条件的点为(); 5. 在区域2的每个位置处，从开始，反复按照公式(1.1.3-6)更新决策参数，若决策参数小于0则不变，反之加1，一直循环到()为止;(Input ellipse center and long and short axis diameter; 2. The first point of the center on the ellipse at the origin is calculated. 3. According to formula (1.1.3-2), the initial value of decision-making parameters in region 1 is calculated. 4. At each location in region 1, the decision-making parameters are updated repeatedly according to formula (1.1.3-3). If the decision-making parameters are less than 0, they will remain unchanged. If the decision-making parameters are less than 0, then add 1 and cycle until the first point satisfying this condition is (); 5. At each location of region 2, the decision parameters are updated repeatedly according to the formula (1.1.3-6). If the decision parameters are less than 0, they will remain unchanged. If the decision parameters are less than 0, then add 1 and cycle until ().)

利用粒子群优化算法实现瞬变电磁法视电阻率反演(Inversion of apparent resistivity of transient electromagnetic method using particle swarm optimization algorithm)

说明：  SGK字典学习速率远远优于K-svd算法！(The learning rate of SGK dictionary is much better than that of K-SVD algorithm)

一个简单的基于角色的Python访问控制实用程序。